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May 19, 1931.

E. C. ADDISON ET AL RI'WEIRJIBLI?, DOUBLE DIGGING vEDGE SCRAPER FiledApril s, 19:50

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Patented May 19, 1931 i I 1,806,551-V UNITED STATES PATENE OFFICE EDWARDo. ADDISON, or OAMDEN, NEW JERSEY, AND WARREN DELPIIIA, PENNSYLVANIA, AssIeNORS 'ro R. RREAIIITIONTy OOMP'ANY, OP PiII'IL DELPrIIA,PENNSYLVANIA, A CORPORATION OE PENNSYLVANIA REVERSIBLE DOUBLE DIGG'INGEDGE SORAPER Application led April 3,

,The subject of our invention is a scraper for use with coal storage orlike systems, which has two digging edges.

Another feature of our improved scraper is that the towing means isattached in the vertical center of the forward edge of the scraper. p

A further feature of our improved scraper is that there is that there isprovided a bail or brace in the vertical center of the front edge of thescraper. v

Yet another feature of our improved scraper is that there are providedflexible adjustable connections between the horizontal center Of saidbail and the towing means for said scraper and between said bail and therear of said scraper.

For a further exposition of our invention reference may be had to theannexed drawings and specification at the end whereof our invention willbe specifically pointed out and claimed. v

In the drawings,

Figure 1 represents a plan view of our improved scraper.

Figure`2 represents a side elevation of our improved scraper.

Figure 3 is a detailed cross A A of Figure 1.

Our improved scraper consists yof two arms 1 and 2 joined together at adivergent angle at the rear of has an upper and a lower cutting edge 3and l respectively. These cutting edges may be made remov ble if sodesired and may have attached thereto detachable digging teeth 5. Attheir forward ends, arms 1 and 2 terminate in Straight side plates 6 and7 At their forward ends said straight side plates 6 and 7 terminate incontinuous digging edges 8 and 9 which may be made detachable and whichmay be made of harder material than the remainder of the scraper. Asuitable eX- ample 'of Such a material is manganese steel which givesadded stiness and greater wearing qualities to said digging edges.

In the vertical center of said'side plates 6 and 7 there is mounted abail generally indicated at 10. As is more clearly Seen in Figure 3,said bail consists of a reenforcing plate il section on line thescraper. Each of said arms Y 1930; serial m1441229;

having fastened toits upper and ylower faces: channel bars 12. Attachedto the edges of the channels and passing over theedgesof the reenforcingplate'andwelded or otherwise fastened tosaid channels are platedeflectors 13 of curved shape forming aniarrow shape in vertical crosssection.

Attached ati the vertical center of the Y for-4 wardedge of the sideplates 6' and 7 `are shackles lflfand 15 pivotally mountedjor other wisefastened thereto. These shackles serve for the attachment of the? frontbridle chains 16v or forv the attachment of other 'towingmeans. Bridlechainswhich cable 18 or tached. ABetween ring 17 andthehorizontalcenterl ofl bail 10 there is provided a flexible adjustable connection.Our preferred enibodiment of such a connection is having a turnsbuckle2O therein whichserves to keep the chainj taut. Betwleenrthe horiezontal center of the bail and the rear of the scraper there is alsoprovided a flexible connection. Such a connection may be suitablyprovided byfa chain 21 leading to ajswivel eye 22 which is adiustablv.attached to the scraper arms 1 and 2 bynuts 23 orother s uit ableattachment. n

Connection for a cable or other towing means vis provided'. at thejrearof the scraper by pivotally ring 26., v` *i Y f vv A y Mln order thatour scraper may be 'capable of digging on either horizontal edge itisim- `orta=-nt that forward edge of the scraper.V Such connec-r tions areprovided by shackles 14 and 15 and bybely 'I is likewiseimportant toprovide a flexible connection between the horizontal# center of bail 11andthe towing means I necessary because of the fact that when thescraper' isy being used' ay pull iseXerted on" the bridle chains 156 infrontwhich has a tendency to pull arms 1 and 2 of the scraper together.Chain 19 is provided to take part of this pull and may be kept suitablytaut for that pur- PQsf @here 21 is als@ Proxies@ te sereni@ H. HILL, OFPrI'IIQA head 16 lead to 4aring 17 to other towing'means is at` a chain'19'v Vmounted clevises whichv carry rear bridle chains25 which terminatein aV the connection for the towing. means be made at the verticallcenter of the.

` a flexible connection this strain directly to the back of the scraper.

It is also advantageous and important to provide the straight diggingedges 8 and 9 as these provide a large straight cutting edge which digsinto the material being moved. These edges keep the scraper traveling ina straight path and prevent snaking or deviation of the scraper from itsproper path. Drag Scrapers are frequently operated so as to dig a deeptrench in the material being worked on and the edges 8 and 9 guide alongthe walls of such a trench and present a large sharp cutting edge.

We do not intend to be limited in the practice of our invention save asthe scope of the prior art and of the attached claims may require.

We claim:

l. A scraper having divergent arms, a bail connecting said divergentarms at the vertical center of their forward ends, means for towing saidscraper means for attaching the towing means for said scraper to thehorizontal center of said bail, and a flexible connection between thehorizontal center of said bail and the rear of said scraper.

2. A scraper having divergent arms, a bail connecting said divergentarms at the vertical center of their forward ends, attaching meansprovided at the vertical center of the forward ends of said arms, meansfor towing said scraper, flexible connections between said towing meansand said attaching means, a flexible connection between said towingmeans and the horizontal center of said bail, and a flexible connectionbetween the horizontal center of said bail and the rear of said scraper.

3. A scraper having divergent arms, a bail connecting the forward endsof said arms at their vertical center, curved plates forming the frontand rear surfaces of said bail, attaching means at the vertical centerof the forward ends of said arms, means for towing said scraper attachedto said attaching means, and a flexible connection between said towingmeans and the horizontal center of said bail.

4. A scraper having divergent arms, a bail connecting the forward endsof said arms at their vertical center, curved plates forming the frontand rear surfaces of said bail, attaching means at the vertical centerof the forward ends of said arms, means for towing said scraper attachedto said attaching means, between said towing means and the horizontalcenter of said bail, and a flexible connection between the horizontalcenter of said bail and the rear of said scraper.

EDWARD C. ADDISON. WARREN H. HILL.

